| 1 | 253-09-8 | Tricyclo[4.4.0.02,7]decane | Tricyclo[4.4.0.02,7]decane | C10H16 | | |
| 2 | 253-11-2 | Tricyclo[4.2.1.12,5]decane | Tricyclo[4.2.1.12,5]decane | C10H16 | | |
| 3 | 253-14-5 | Twistane | Twistane | C10H16 | | |
| 4 | 253-24-7 | 1-Benzoborin | 1-Benzoborin | C9H7B | | |
| 5 | 253-27-0 | | 1H-2,3,1-Benzoxazaborine (8CI,9CI) | C7H6BNO | | |
| 6 | 253-28-1 | | Isoarsinoline | C9H7As | | |
| 7 | 253-35-0 | 1H-2-Benzopyran | 1H-2-Benzopyran | C9H8O | | |
| 8 | 253-37-2 | Isophosphinoline | Isophosphinoline | C9H7P | | |
| 9 | 253-38-3 | | 1H-2-Benzothiopyran(7CI,8CI,9CI) | C9H8S | | |
| 10 | 253-40-7 | 2λ4-2-Benzothiopyran (9CI) | 2λ4-2-Benzothiopyran (9CI) | C9H8S | | |
| 11 | 253-45-2 | 2,7-萘啶 | 2,7-Naphthyridine(7CI,8CI,9CI) | C8H6N2 | | |
| 12 | 253-50-9 | 2,6-萘啶 | 2,6-Naphthyridine(7CI,8CI,9CI) | C8H6N2 | | |
| 13 | 253-52-1 | 2,3-二氮杂萘 | Phthalazine | C8H6N2 | 哒嗪;杂环类;其它杂环;医药中间体;有机中间体 | |
| 14 | 253-53-2 | PYRIDO[3,4-D]PYRIDAZINE | PYRIDO[3,4-D]PYRIDAZINE | C7H5N3 | | |
| 15 | 253-56-5 | | Pyrano[4,3-c]pyran(8CI,9CI) | C8H6O2 | | |
| 16 | 253-61-2 | | Pyridazino[4,5-d]pyridazine | C6H4N4 | | |
| 17 | 253-66-7 | 1,2-二氮萘 | CINNOLINE | C8H6N2 | | |
| 18 | 253-69-0 | 1,7-Naphthyridine(6CI,7CI,8CI,9CI) | 1,7-Naphthyridine(6CI,7CI,8CI,9CI) | C8H6N2 | | |
| 19 | 253-70-3 | | 6H-Pyrano[3,4-b]pyridine | C8H7NO | | |
| 20 | 253-71-4 | | 1H-Pyrano[3,4-b]pyridine (8CI,9CI) | C8H7NO | | |
| 21 | 253-72-5 | 1,6-二氮萘 | Naphthyridine | C8H6N2 | 有机化学;医药中间体;喹啉衍生物 | |
| 22 | 253-73-6 | 3,4,10-triazabicyclo[4.4.0]deca-1,3,5,7,9-pentaene | 3,4,10-triazabicyclo[4.4.0]deca-1,3,5,7,9-pentaene | C7H5N3 | | |
| 23 | 253-75-8 | | 8H-Pyrido[3,2-d][1,2]oxazine | C7H6N2O | | |
| 24 | 253-77-0 | | 5H-Pyrano[4,3-b]pyridine | C8H7NO | | |
| 25 | 253-79-2 | | 5H-Pyrido[2,3-d][1,2]oxazine | C7H6N2O | | |
| 26 | 253-82-7 | 喹唑啉 | Quinazoline | C8H6N2 | 喹唑啉;杂环砌块;有机砌块 | |
| 27 | 253-83-8 | | 1,2,3-benzotriazine | C7H5N3 | | |
| 28 | 253-86-1 | Pyrido[3,4-d]pyrimidine (7CI,8CI,9CI) | Pyrido[3,4-d]pyrimidine (7CI,8CI,9CI) | C7H5N3 | | |
| 29 | 253-87-2 | Pyrido[4,3-d]pyrimidine (7CI,8CI,9CI) | Pyrido[4,3-d]pyrimidine (7CI,8CI,9CI) | C7H5N3 | | |
| 30 | 253-88-3 | Pyrimido[4,5-d]pyridazine (7CI,8CI,9CI) | Pyrimido[4,5-d]pyridazine (7CI,8CI,9CI) | C6H4N4 | | |
| 31 | 253-89-4 | 5H-Thiopyrano[4,3-d]pyrimidine (8CI,9CI) | 5H-Thiopyrano[4,3-d]pyrimidine (8CI,9CI) | C7H6N2S | | |
| 32 | 253-92-9 | | 2H-3,1-Benzoxazine | C8H7NO | | |
| 33 | 253-93-0 | | 4H-3,1-Benzoxazine | C8H7NO | | |